Filament treatment



the well known spool or roller sp 4 process, the freshly spun filaments are woun Patented Mar. 21, 1933 UNITED" STATES mm scmnn'r, OI worm-mp A mzn, exam assrdnon 'ro AmIOAI' GLAKZSTOII'I' OOBPOBL'I'IQI, 01' mzw YORK, I. 1; OOH-P0383101 0? DELAWARE rmam'r Imam-r i Drawing. Application ma lay ILJSSS, Serial It. 01am, an in Germany :m an.

In the manufacture of artificial silk by directly upon spools. These spools ma be either small or large. The artificial is then twisted, this being accomplished directl from the smaller spools or after a respoo 'ng of the larger ones, and brought into t e form of skeins. The artificial filaments are then subjected to the difierent necessary treatments, such as desulphurization, extrac-' tion of copper, bleaching, deacidifying, reviving, sizing and dyeing, and are afterwards dried. These steps refer more specifically to artificial filaments produced by the wet spinning process such as from cuprammonmm or viscose solutions.

After the development of the process outlined above, it was found that 1t would be more advantageous to treat the filaments while they were upon the spools rather than while. they were in the form of twisted skeins. In order to accomplish this, perforated or foraminous spools were introduced, and the filaments, while upon these spools, were subjected to a treatment by liquids under the influence of either pressure or vacuum. The filaments were then dried and twisted off of the spools to be made up as bottle bobbins, disc spools, cross spools, cones and the like.

A great advantage resides in this process, inasmuch as the time of treatment is shortened considerably. However, a disadvantage has also been found to exist. After the drying of the yarn upon the spools, a product with irregular physical properties resulted because, for the most part, uneven shrinkage of the yarn upon the spools was ob tained. The yarn on the inner portion of the spool'was subjected to a greater strain than that on the outer portion, and consequently dried unevenly. It was found that even considerable steaming of the yarn did not eliminate these difiiculties.

In my new invention, a process is set forth in which the original wet treatment of the yarn in skein form is avoided, but in which unevenness of shrinking is also avoided. My new process may be applied to either the spool or the roller spinning process, wherein either large or small s ls are emplo ed.

tially dried during this process. If the large spools, or rollers, are used the yarn is wound upon smaller spools infa known manner in order that it may be twisted. The'yarn is then rewound upon secondary supporting devices. These su porting devices are characterized by the act that they are removable after the completion of the Mk! They may be in the form of collapsi le reels, deformable spools or spools which are provided with a cone taper so that it is possible to draw oif the wound ackage.

One characteristic of the wind upo secondary supporting means in my present invention, is that the open or honey-combed winding is not necessary, and a very tight 11 thesecomparatively thick winding, in order to produce a cake-like form of the filaments, is used. In order that a cake-like group of filaments may be formed, the spools may be provided with removable flanges or discs in Erdeg that-well formed edges will be prouce The next step in my present process is that the packages thus formed are removed from the supporting devices and then subjected to the desired wet treatment and aftertreating processes, such as desulphurizatiom'ete, pointed out above. No reinforcement for the interior of these cakes or packages is necessary.

It has been found advisable in somein out any support of any sort and therefore the physical irregularities pointed out above are avoided.

I have also found that twine may be la1d along the spools prior to the winding thereof and may be used in the manner set forth for the use of the fabric.

The after treatment of these ,cakes may be performed in many ways, for example, n a pot-shaped perforated vat which varies in size with the size of the package or cake, or by spraying the packages when they are placed on a series of rods. Centrifugal washing may be used either in the vat noted above or by placing the packages upon gridiron-like gratings in large centrifuges, then subjecting them to the treating liquids. They may also be placed upon a support in a series superimposed upon one another, and treated as in the vacuum or pressure washing process. A suitable compression or tightening of the package may be necessar in the event that this latter process is use Having nowset forth my invention as required by the patent statutes, what I desire to claim is:

1. In a method of treating spun filaments, the steps of spooling the filaments, aftertreating with appropriate liquids while on the spool, rewinding and twistingthe filaments onto a second supporting means, removing the filaments in the form of a cake from this second support, and further wet treating the said cake.

2. In a method of treating spun filaments, the steps of spooling the filaments, aftertreating with appropriate liquids while on the spool, rewinding and twisting the filaments onto a second supporting means, said means being covered with a coverin prior to the rewinding of the filaments t ereon, removing the filaments in the form of a cake from this second support, and further wet treating the said cake, said covering acting to keep the filaments from tangling or knotting. I

3. In a process of the class set forth, the steps. of drying spool-spun filaments, rewinding and twistlng them'onto a second support, removing the filament V bod so formed, as a unit, and treating this b0 y to aftertreatment and drying while in an unsupported state.

4. In a process of the class set forth, the steps of drying spool-spun filaments, re-

respooling onto secondary supports, remov- COD-- ing the filaments bodily from said secondary supports, and wet treating and drying them unsupported.

7. In the production of even shrinkage yarn, the steps of spooling spun filaments, wet-treating and drying the yarn while on the spool, respooling onto secondary supports, removing the filaments bodily from said secondary supports, and Wet treating and drying them unsupported.

8. In the production of even shrinkage yarn, the steps ofspooling spun filaments, respooling onto secondary supports, in the form of a tight cake-like filament body, removing the filaments bodily from said secondary supports, and wet treating and drying them unsupported.

9. In the production of even shrinkage yarn,the steps of spooling spun filaments, wet-treating and drying the yarn While on the spool, respooling onto secondary supports, in the form of a tight cake-like filament body, removing the filaments bodily from said secondary supports, and wet treatin I and drying them unsupported.

n witness whereof I aflix m signature.

KURT S HMIDT.

winding them onto a second support to form I a filament body comprising a tightly wound cake, removing the filament body so formed, as a unit, and treating this body to after, treatment and drying while in an unsupported state.

5. In a process of the type described, the steps of spool spinning and drying filaments, rewinding the yarn into a tight cake onto second supporting means from which the cake may be removed bodily, removing to aftertreatment DISCLAIMER 1,902,526.-Kurt Schmidt, Wu rtal-Elberfeld-GrenzmGei-many. FmAunN'rTnm'r- MENT. Patent da arch 21, 1933. Disclaimer filed December 6, 1935, by the assignee, North American Rayon Corporation. Hereby enters this disclaimer to those claims numbered 3, 4, 5, 6, and 8, in the said Letters Patent, said claims being in the following words, to wit:

3. In a process of the class set forth, the steps of drying spool-spun filaments, rewinding andtwisting them onto a second support, removing the filament body so formed, as a unit, and treating this body to aftertreatment and drying while in an unsupported state.

4. In a process of the class set forth, the etc of spool-spun filaments, rewinding them onto a-second support to form a ament y comprising a tiiltaly wound cake, remo the filament body so formed, as a unit, and treating this y fa n fdrying while in an unsupported state.

5. In a process of the type described, the steps of spool spinning and filaments, rewinding the yarn into tagiifiht cake onto second su porting means in which the cake may be removed remo the cake y and then wet treating and drying it while it is in an unsupporte condition.

6. In the production of even shrinkage yarn, the steps of spooling spun filaments, respoolingonto secondary supports, removing the filaments bodily from said v secondary supports, and wet treating and drying them unsu ported.

8,. In the production'of even shrinkage yarn, the steps oi spooling spun filaments, respooling onto secondary supports, in the form of a tight cake-like filament body,

removing the filaments bodily from said secondary supports, and wet treating and them unsupported.

[ Gazette January 14, 1986.] 

